Question

factor each difference of squares
256r^4 - 81 =

Answer 1

okay to do this you need to know that

(x-a)(x+a)=x²-a²

so if you look at
256r^4 - 81 this is equal to x²-a²

so...
256r^4=x²

81=a²

find out x and a

can you do this?

Answer 2

i got the answer but thanks anyway

Answer 3

(16r²-9)(16r²+9)